.nav {
  position: relative;
  border: none;
  border-radius: 10em;
  display: flex;
  list-style: none;
  background: #c5d0cd;
  box-shadow: 20px 40px 40px #00000033;
  padding: 10px;
}

.nav li a {
  position: relative;
  padding: 15px 50px;
  font: 500 24px;
  border: none;
  outline: none;
  color: #a86c68;
  display: inline-block;
  text-decoration: none;
  z-index: 3;
}

/* nvaLink 自带类名 */
.active{
  /* opacity: 0; */
  border-radius: 10em;
  background-color: #7f939c;
  /* 阴影 */
  box-shadow: 0 0 15px #b98986 inset;
}
